Duplex centering-machine.



No. 680,724. Patented Aug. 20, 190i. F. W. MUSSETTER, J. McCARTHY-& W. W. HOLMES.

DUPLEX CENTERING MACHINE.

(Application filed Jan. 23, 1699.)

2 Sheets-Sheet I.

(No Model.)

O... ALA? No. 680,724. Patented Aug. 20, 1am. F. w. MUSSETTER, J. McCABTHV e.w. W. HOLMES. DUPLEX CENTERING MACHINE.

(Application filed Jan. 23, 1899.) 7 (No Model.) 2 Sheets-Sheet 2.

Hiii;

NlTED dramas PATENT Orr-1min.

FLEMING W. MUSSETTER AND JAMES MCCARTHY, OF CHICAGO HEIGHTS, AND IVILLIAM W. HOLMES, OF CHICAGO, ILLINOIS, ASSIGNORS TO TI-IE Q. d? C. COMPANY, OF CHICAGO, ILLINOIS.

DUPLEX CENTERlNG WlACHlNE.

$EEGIFICATION forming part of Letters Patent No. 680,724, dated August 20, 1901.

Application filed January 23, 1899. Serial No. 703,173- (No model.)

To (tZZ whom, it may concern:

Be it known that we, FLEMING W. Mus- SETTER and Lucas MCCARTHY, residing at Chicago Heights, and WILLIAM W. HOLMES,

5 residing at Chicago, county of Cook, State of Illinois, citizens of the United States, have invented certain new and useful Improvements in Duplex Centering Machines, of Which the following, taken in connection with [O the accompanying drawings, is a full, clear, and exact description, such as will enable others skilled in the art to apply the invention.

This invention relates to boring and drill I5 ing appliances, having particular reference to machines for center-marking the ends of car-axle blanks or like articles, thus preparing them for introduction to a lathe, whereby the journal bearings are turned and the blanks otherwise trued up for service.

As a further object the invention contemplates the construction of an automatic duplex machine capable of centering and drilling both ends of a blank simultaneously, and

comprises, first, clutching or work -holding mechanism; secondly, feeding mechanism, and, thirdly, the drilling mechanism, all as will later and more fully appear.

The invention will be hereinafter particu- 0 larly described, and pointed out by the claims following.

In the accompanying drawings, which form part of this specification, and whereon corresponding letters of reference indicate like 5 parts in the several views, Figure 1 is a side with protruding ends, upon one of which are mounted fast and loose belt-pulleys C C as the means of driving said shaft from a source of power. (Not shown.) SurmountingbaseA at each end are hollow head-stocks D D, identical one with the other both in construction and in function, each containing drilling mechanism also of identical construction, but of reverse action, so that a description of one stock and coacting parts will suffice for both.

Fitted in the outer end of stockD is a sleeve E, havinga reduced inwardly-extending body a, through the entire length of which passes a rotatable drill-spindle b with an enlarged working head 0, containing a removable drill d, said head abutting a suitable washer e at the inner end of the sleeve aforesaid, thus forming an annular chamber-f around body a for purposes that will later appear. Upon the protruding end of spindle b and in screwthreaded relation therewith are nuts g g, which bear upon the adjacent end of sleeve E for the purpose of adjusting or taking up wear in the drill-spindle, particularly at its head 0, by withdrawing said spindle and head into the stock D sufficiently to compensate for such Wear.

Beyond the take-up nuts 9 g there is a driven gear-wheel F, splined uponspindle I), thus permitting a longitudinal or reciprocal movement of the latter and at same time imparting thereto a rapid rotary motion through the agency of a driving-gear G, keyed upon and moving with the main shaft B. As a means of keeping said driven and driving gears F G in alinement at all times a boss II is loosely mounted upon the shaft B, having upward1y-extending parallel arms h 72,, which embrace said gears, as shown, and are themselves retained in position above by the tail of spindle Z) passing through eyes therein.

1 I represent vertical levers pivotally supported at their lowermost extremity upon base A or upon straps i i, projected therefrom, the same being pivotally connected at the opposite or upper end by set-bolt j to a split clamp- 95 ing-ring J. Ring J occupies a position in chambers f f, snugly surrounding body a of the sleeves E E, which latter accordingly may be reciprocated freely under influence of said lovers to advance and retract the drill-spindles and drills.

Journaled in opposite sides of base A is a cross-shaft K, having keyed thereto oppositely-projecting cams L L and having thereon also a worm-gear M, the latter being loosely mounted and provided with clutch-teeth 7c, normally engaged by corresponding teethl upon a spring-pressed hub N. The hub N is splined upon said cross-shaft and bears upon its surface a stud or pin m, which aids in dis engaging its teeth when occasion requires. In like manner a second stub-shaft O is secured in the sides of base A adjacent to and parallel with shaft K, but differing in that it is equipped at one end with a hand-wheel P and near its opposite end with a lever 11,, having an inclined or beveled outer end adapted to obstruct the path of pin on when shaft K is rotated for the purpose of advancing hub N, and thus disengaging the clutch. At such times the worm-gear M may revolve idly in mesh with and under influence of worm M, located by preference near the center of main driving-shaft B, as shown.

Pivotally secured to levers I I are sectional pitman-rods Q Q, rendered adjustable as to length by means of turnbuckles g and each pitmanrod terminates in a collar 0 0, surrounding the eccentric cams L L, rotating with shaft K, as aforesaid, thereby rocking said levers I I in reverse directions and through them effecting a corresponding advance and withdrawal of drills d d.

. Rotatably mounted in suitable brackets R R, rising from opposite sides of bed A in close proximity to the' head-stocks D D, are transverse shafts S S, each having cut thereon right and left screw-threads p g, respectively, of corresponding pitch and each having a beveled gear 1' aflixed to its projecting end. In threaded connection with said screwsp q, and consequently under control of shafts S S, are oppositely-moving chucks or vise-clutches T T for centering and firmly retaining all work presented to the machine for action of its drills.

At one side of base A, also rising from its surface, are journaled boxes U U, affording a support for the opposite ends of a longitudinal clutchcontrolling shaft V, the latter having keyed thereon a hand-wheel W,whereby it is rotated in either direction, and terminating in beveled driving-gears s s, mating with the gears r r aforesaid, and thus serving to open or close both sets of clutches T T simultaneously through the agency of their respective screw connections with the transverse shafts S S.

Located between one head-stock, preferably that indicated by the reference-letter D, and one chuck or work-holding clutch T is an adjustable stop or gage X, loosely mounted upon a horizontal adj usting-screw t, and flanked upon each side by lock-nuts u u for retaining said gage in a given position. Screw i is swiveled in fixed lugs 12 '0, supported upon the surface of base A, and by this arrangement gage X may be set to abut the end of an axle, shaft, or other article being operated upon, and thus maintain it in proper working position with relation to both drills (Z.

As above described, it will be apparent that the machine is automatic and duplex in its construction, there being two head-stocks, duplicate drilling and drill-feeding mechanisms, and two corresponding chucks or workholding clamps. The drill-spindles and drills, however, are driven in reverse directions by power from the common driving -shaft 13, there being a small gear'w interposed between the driven and driving gears F G, respectively, to cause such change in the direction of rotation, said gear to being loosely mounted upon a stub-shaft 5c, connecting parallel arms h h, rising from the boss H at that end of the machine bearing the head-stock D.

The foregoing being a description of our invention in its preferred form of construction, its operation, briefly stated, is as follows: Presuming, for purposes of illustration, that a car-axle or like article has been introduced into the open jaws of chucks or clutches T T with one end abutting the adjustable gage X, as shown by Fig. 1, hand-wheel W is then employed to rotate shaft V and simultaneously therewith both transverse shafts S S, through the agency of interposed beveled gears r s, right and left threads 19 upon said shafts S S, thus advancing the jaws of chucks TT toward a common center. An axle-blank or like article now being firmly held in position, the main driving-belt (not shown) is shifted to driving-pulley C and the operation of automatically drilling or producing lathe-centering depressions in the end of such axleblank is effected as follows: Shaft B operates through driving and driven gears F G to rotate drill-spindles b b and drills d d in opposite directions, the worm M at same time driving worm gear M normally in clutch with hub N, the latter being splined upon cross-shaft O, which it accordingly drives, and with it the cams L L. These cams then operating through collars 0 o throw pitman-rods Q Q in opposite directions with each rotation of shaft 0 a distance equal to the eccentricityof said cams, at same time imparting to vertical levers I I a corresponding movement upon their supporting-straps t t' as a center. Simultaneously with the aforesaid operation sleeves E E in the grasp of split ring J at end of levers I I are advanced lon gitudinally in head-stocks D D, taking with them drill-spindles b b and sinking the revolving drills into both ends of an axle-blank or other like article as said drills approach each other. Continued rotation of cams L L thereupon reversing the action of parts last described automatically withdraws drills d d, and the work is removed after being released from clutches T T by a reverse movement of hand-Wheel W and coacting parts. During such removal and replacing of an axle or other blank it is important that the feed of the drilling apparatus be interrupted or suspended. To this end wheel P is utilized to rock its supporting-shaft O and project the beveled outer end of levern into the path of stud m on hub N as it revolves. This efiected, said stud and hub are advanced upon shaft K a sufficient distance to disengage clutchteeth 76 l, whereupon the worm-gear M revolves loosely upon said shaft K, the latter, with its affixed eccentric cams L L, remaining stationary and for the time being of no effect upon balance of parts.

The foregoing operation may of course be repeated indefinitely, and it will be particularly noted that a wide range of adjustment is provided in order that the machine may perform its functions to a nicety and meet all requirements. For instance, the throw of sleeves E E and within contained drill-spindles may be regulated by the relative position thereon of clamping-rings J J, and this reciprocal action may be newly adjusted, if desired, by lengthening the sectional pitmanrods Q, Q. I

The foregoing being the nature and general purposes of our invention, We now claim and desire to secure by Letters Patent 1. In a centering-machine, the combination with oppositely-placed head-stocks each pro vided with a drill, of feed mechanism therefor, and a driving mechanism common to both drills and the feed mechanism thereof, substantially as and for the purposes specified.

2. In a centering-machine the combination with cooperating driving and feeding mechanisms, of a headstock, a drill-spindle having an enlarged working head, and a spindlecarrying sleeve having a reduced body recip rocally mounted in the head-stock, substantially as described.

3. In a centering-machine the combination with cooperating driving and feeding mechanisms, of a head-stock, a drill-spindle, a spindle-carrying sleeve having a reduced body reciprocally mounted in the head-stock, and an adjustable clamping-ring for connecting said sleeve with the feeding mechanism, substantially as described.

at. In a duplex centering-machine, the combination with oppositely arranged headstocks and drill spindles, of interposed chucks, driving mechanism common to both of said drills, feed mechanism common to both ofsaid drills, and means for actuating the feed mechanism from the driving mechanism of the drills, substantially as and for the purposes specified.

5. In a duplex centering-machine the combination with driving mechanism, headstocks and drill-spindles, of drill-feeding mechanism automatically cooperating with said driving mechanism and comprising oppositely-moving pitman-rods in communication with said drill-spindles for simultaneously reciprocating said spindles in opposite directions, substantially as described.

6. In a duplex centering-machine the combination with driving mechanism, headstocks and drillspindles, of drill feeding mechanism automatically cooperating with said driving mechanism and comprising oppositely-arranged pitman-rods in communication with said spindles, and cams upon a common supporting-shaft for reciprocating said spindles and pitman -rods in reverse directions, substantially as described.

'7. In a duplex centering-machine, the combination with oppositely arranged headstocks and drill-spindles, of driving mechanism which actuates both of said drill-spindles, feed mechanism for said drill-spindles, and a worm-and-gear mechanism which actuates the feed mechanism from the drill-driving mechanism, substantially as and for the purposes specified.

8. In a duplex centering-machine the combination with drill-spindles and driving mechanism therefor, of drill-feeding mechanism comprising oppositely-arranged pitman-rods in communication with said spindles, cams for simultaneously throwing said rods in re verse directions, a'worm-gear for driving the cams, and a clutch for maintaining said. cams and gear normally in operative relation, substantially as described.

9. In a duplex centering-machine the combination with drill-spindles and driving mechanism therefor, of drill-feeding mechanism comprising oppositely-arranged pitman-rods in communication with said spindles, cams for simultaneously throwing said rods in reverse directions, a worm gear fordriving the cams, a clutch for maintaining said cams and gear normally in operative relation, a lever for disengaging said clutch, and a rock-shaft for controlling said lever, substantially as described.

10. In a duplex centering-machine the com bination with head-stocks and drill-spindles, of pivoted levers for actuating the drill-spindles, oppositely-moving adjustable pitmanrods, and means for simultaneously operating said pitman-rods, substantially as described.

In testimony whereof we affix our signatures, in presence of two witnesses, this 10th day of January, 1899.

FLEMING WV. MUSSETTER. JAMES MCCARTHY. \VILLIAM W. HOLMES.

Witnesses:

B. O. WIEDERHOLD, D. CoNNoLLY. 

